2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <sys/types.h>
30 #include <lttng-share.h>
32 #include "hashtable.h"
34 #include "ust-consumer.h"
38 * Delete ust app event safely. RCU read lock must be held before calling
41 static void delete_ust_app_event(int sock
, struct ust_app_event
*ua_event
)
43 /* TODO : remove context */
44 //struct ust_app_ctx *ltctx;
45 //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) {
46 // delete_ust_app_ctx(sock, ltctx);
49 ustctl_release_object(sock
, ua_event
->obj
);
54 * Delete ust app stream safely. RCU read lock must be held before calling
57 static void delete_ust_app_stream(int sock
, struct ltt_ust_stream
*stream
)
60 //stream is used for passing to consumer.
61 //send_channel_streams is responsible for freeing the streams.
62 //note that this will not play well with flight recorder mode:
63 //we might need a criterion to discard the streams.
67 * Delete ust app channel safely. RCU read lock must be held before calling
70 static void delete_ust_app_channel(int sock
, struct ust_app_channel
*ua_chan
)
73 struct cds_lfht_iter iter
;
74 struct ust_app_event
*ua_event
;
75 struct ltt_ust_stream
*stream
, *stmp
;
77 cds_list_for_each_entry_safe(stream
, stmp
, &ua_chan
->streams
.head
, list
) {
78 delete_ust_app_stream(sock
, stream
);
81 /* TODO : remove channel context */
82 //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) {
83 // hashtable_del(ltc->ctx, &iter);
84 // delete_ust_app_ctx(sock, ltctx);
86 //ret = hashtable_destroy(ltc->ctx);
88 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
89 hashtable_del(ua_chan
->events
, &iter
);
90 delete_ust_app_event(sock
, ua_event
);
93 ret
= hashtable_destroy(ua_chan
->events
);
95 ERR("UST app destroy session hashtable failed");
104 * Delete ust app session safely. RCU read lock must be held before calling
107 static void delete_ust_app_session(int sock
,
108 struct ust_app_session
*ua_sess
)
111 struct cds_lfht_iter iter
;
112 struct ust_app_channel
*ua_chan
;
114 if (ua_sess
->metadata
) {
116 * We do NOT release the stream object and metadata object since they
117 * are release when fds are sent to the consumer.
121 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
122 hashtable_del(ua_sess
->channels
, &iter
);
123 delete_ust_app_channel(sock
, ua_chan
);
126 ret
= hashtable_destroy(ua_sess
->channels
);
128 ERR("UST app destroy session hashtable failed");
137 * Delete a traceable application structure from the global list. Never call
138 * this function outside of a call_rcu call.
140 static void delete_ust_app(struct ust_app
*app
)
143 struct cds_lfht_node
*node
;
144 struct cds_lfht_iter iter
;
145 struct ust_app_session
*ua_sess
;
149 /* Remove from key hash table */
150 node
= hashtable_lookup(ust_app_sock_key_map
,
151 (void *) ((unsigned long) app
->key
.sock
), sizeof(void *), &iter
);
153 /* Not suppose to happen */
154 ERR("UST app key %d not found in key hash table", app
->key
.sock
);
158 ret
= hashtable_del(ust_app_sock_key_map
, &iter
);
160 ERR("UST app unable to delete app sock %d from key hash table",
163 DBG2("UST app pair sock %d key %d deleted",
164 app
->key
.sock
, app
->key
.pid
);
167 /* Socket is already closed at this point */
169 /* Delete ust app sessions info */
170 if (app
->sock_closed
) {
174 cds_lfht_for_each_entry(app
->sessions
, &iter
, ua_sess
, node
) {
175 hashtable_del(app
->sessions
, &iter
);
176 delete_ust_app_session(app
->key
.sock
, ua_sess
);
179 ret
= hashtable_destroy(app
->sessions
);
181 ERR("UST app destroy session hashtable failed");
185 if (!app
->sock_closed
) {
186 close(app
->key
.sock
);
189 DBG2("UST app pid %d deleted", app
->key
.pid
);
196 * URCU intermediate call to delete an UST app.
198 static void delete_ust_app_rcu(struct rcu_head
*head
)
200 struct cds_lfht_node
*node
=
201 caa_container_of(head
, struct cds_lfht_node
, head
);
202 struct ust_app
*app
=
203 caa_container_of(node
, struct ust_app
, node
);
209 * Find an ust_app using the sock and return it. RCU read side lock must be
210 * held before calling this helper function.
212 static struct ust_app
*find_app_by_sock(int sock
)
214 struct cds_lfht_node
*node
;
215 struct ust_app_key
*key
;
216 struct cds_lfht_iter iter
;
218 node
= hashtable_lookup(ust_app_sock_key_map
,
219 (void *)((unsigned long) sock
), sizeof(void *), &iter
);
221 DBG2("UST app find by sock %d key not found", sock
);
225 key
= caa_container_of(node
, struct ust_app_key
, node
);
227 node
= hashtable_lookup(ust_app_ht
,
228 (void *)((unsigned long) key
->pid
), sizeof(void *), &iter
);
230 DBG2("UST app find by sock %d not found", sock
);
233 return caa_container_of(node
, struct ust_app
, node
);
240 * Return pointer to traceable apps list.
242 struct cds_lfht
*ust_app_get_ht(void)
248 * Return ust app pointer or NULL if not found.
250 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
252 struct cds_lfht_node
*node
;
253 struct cds_lfht_iter iter
;
256 node
= hashtable_lookup(ust_app_ht
,
257 (void *)((unsigned long) pid
), sizeof(void *), &iter
);
259 DBG2("UST app no found with pid %d", pid
);
264 DBG2("Found UST app by pid %d", pid
);
266 return caa_container_of(node
, struct ust_app
, node
);
274 * Using pid and uid (of the app), allocate a new ust_app struct and
275 * add it to the global traceable app list.
277 * On success, return 0, else return malloc ENOMEM.
279 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
283 lta
= zmalloc(sizeof(struct ust_app
));
289 lta
->ppid
= msg
->ppid
;
292 lta
->v_major
= msg
->major
;
293 lta
->v_minor
= msg
->minor
;
294 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
295 lta
->name
[16] = '\0';
296 lta
->sessions
= hashtable_new(0);
299 lta
->key
.pid
= msg
->pid
;
300 hashtable_node_init(<a
->node
, (void *)((unsigned long)lta
->key
.pid
),
302 lta
->key
.sock
= sock
;
303 hashtable_node_init(<a
->key
.node
, (void *)((unsigned long)lta
->key
.sock
),
307 hashtable_add_unique(ust_app_sock_key_map
, <a
->key
.node
);
308 hashtable_add_unique(ust_app_ht
, <a
->node
);
311 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
312 " (version %d.%d)", lta
->key
.pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
313 lta
->key
.sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
319 * Unregister app by removing it from the global traceable app list and freeing
322 * The socket is already closed at this point so no close to sock.
324 void ust_app_unregister(int sock
)
327 struct cds_lfht_node
*node
;
328 struct cds_lfht_iter iter
;
331 lta
= find_app_by_sock(sock
);
333 ERR("Unregister app sock %d not found!", sock
);
337 DBG("PID %d unregistering with sock %d", lta
->key
.pid
, sock
);
339 /* Get the node reference for a call_rcu */
340 node
= hashtable_lookup(ust_app_ht
,
341 (void *)((unsigned long) lta
->key
.pid
), sizeof(void *), &iter
);
343 ERR("Unable to find app sock %d by pid %d", sock
, lta
->key
.pid
);
347 /* We got called because the socket was closed on the remote end. */
349 /* Using a flag because we still need "sock" as a key. */
350 lta
->sock_closed
= 1;
351 hashtable_del(ust_app_ht
, &iter
);
352 call_rcu(&node
->head
, delete_ust_app_rcu
);
359 * Return traceable_app_count
361 unsigned long ust_app_list_count(void)
366 count
= hashtable_get_count(ust_app_ht
);
373 * Fill events array with all events name of all registered apps.
375 int ust_app_list_events(struct lttng_event
**events
)
378 size_t nbmem
, count
= 0;
379 struct cds_lfht_iter iter
;
381 struct lttng_event
*tmp
;
383 nbmem
= UST_APP_EVENT_LIST_SIZE
;
384 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
386 PERROR("zmalloc ust app events");
393 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
394 handle
= ustctl_tracepoint_list(app
->key
.sock
);
396 ERR("UST app list events getting handle failed for app pid %d",
401 while ((ret
= ustctl_tracepoint_list_get(app
->key
.sock
, handle
,
402 tmp
[count
].name
)) != -ENOENT
) {
404 DBG2("Reallocating event list from %zu to %zu bytes", nbmem
,
405 nbmem
+ UST_APP_EVENT_LIST_SIZE
);
406 nbmem
+= UST_APP_EVENT_LIST_SIZE
;
407 tmp
= realloc(tmp
, nbmem
);
409 PERROR("realloc ust app events");
415 tmp
[count
].type
= LTTNG_UST_TRACEPOINT
;
416 tmp
[count
].pid
= app
->key
.pid
;
424 DBG2("UST app list events done (%zu events)", count
);
433 * Free and clean all traceable apps of the global list.
435 void ust_app_clean_list(void)
438 struct cds_lfht_node
*node
;
439 struct cds_lfht_iter iter
;
442 DBG2("UST app cleaning registered apps hash table");
446 cds_lfht_for_each(ust_app_ht
, &iter
, node
) {
447 app
= caa_container_of(node
, struct ust_app
, node
);
448 close(app
->key
.sock
);
449 app
->sock_closed
= 1;
451 ret
= hashtable_del(ust_app_ht
, &iter
);
453 call_rcu(&node
->head
, delete_ust_app_rcu
);
457 hashtable_destroy(ust_app_ht
);
458 hashtable_destroy(ust_app_sock_key_map
);
464 * Init UST app hash table.
466 void ust_app_ht_alloc(void)
468 ust_app_ht
= hashtable_new(0);
469 ust_app_sock_key_map
= hashtable_new(0);
473 * Alloc new UST app session.
475 static struct ust_app_session
*alloc_ust_app_session(void)
477 struct ust_app_session
*ua_sess
;
479 /* Init most of the default value by allocating and zeroing */
480 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
481 if (ua_sess
== NULL
) {
486 ua_sess
->handle
= -1;
487 ua_sess
->channels
= hashtable_new_str(0);
496 * Alloc new UST app channel.
498 static struct ust_app_channel
*alloc_ust_app_channel(char *name
,
499 struct lttng_ust_channel
*attr
)
501 struct ust_app_channel
*ua_chan
;
503 /* Init most of the default value by allocating and zeroing */
504 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
505 if (ua_chan
== NULL
) {
510 /* Setup channel name */
511 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
512 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
514 ua_chan
->handle
= -1;
515 ua_chan
->ctx
= hashtable_new(0);
516 ua_chan
->events
= hashtable_new_str(0);
517 hashtable_node_init(&ua_chan
->node
, (void *) ua_chan
->name
,
518 strlen(ua_chan
->name
));
520 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
522 /* Copy attributes */
524 memcpy(&ua_chan
->attr
, attr
, sizeof(ua_chan
->attr
));
527 DBG3("UST app channel %s allocated", ua_chan
->name
);
536 * Alloc new UST app event.
538 static struct ust_app_event
*alloc_ust_app_event(char *name
,
539 struct lttng_ust_event
*attr
)
541 struct ust_app_event
*ua_event
;
543 /* Init most of the default value by allocating and zeroing */
544 ua_event
= zmalloc(sizeof(struct ust_app_event
));
545 if (ua_event
== NULL
) {
550 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
551 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
552 ua_event
->ctx
= hashtable_new(0);
553 hashtable_node_init(&ua_event
->node
, (void *) ua_event
->name
,
554 strlen(ua_event
->name
));
556 /* Copy attributes */
558 memcpy(&ua_event
->attr
, attr
, sizeof(ua_event
->attr
));
561 DBG3("UST app event %s allocated", ua_event
->name
);
569 static void shadow_copy_event(struct ust_app_event
*ua_event
,
570 struct ltt_ust_event
*uevent
)
572 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
573 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
575 /* TODO: support copy context */
578 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
579 struct ltt_ust_channel
*uchan
)
581 struct cds_lfht_iter iter
;
582 struct cds_lfht_node
*node
, *ua_event_node
;
583 struct ltt_ust_event
*uevent
;
584 struct ust_app_event
*ua_event
;
586 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
588 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
589 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
591 /* TODO: support copy context */
593 /* Copy all events from ltt ust channel to ust app channel */
594 hashtable_get_first(uchan
->events
, &iter
);
595 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
596 uevent
= caa_container_of(node
, struct ltt_ust_event
, node
);
598 ua_event_node
= hashtable_lookup(ua_chan
->events
,
599 (void *) uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
600 if (ua_event_node
== NULL
) {
601 DBG2("UST event %s not found on shadow copy channel",
603 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
604 if (ua_event
== NULL
) {
607 shadow_copy_event(ua_event
, uevent
);
608 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
612 /* Get next UST events */
613 hashtable_get_next(uchan
->events
, &iter
);
616 DBG3("Shadow copy channel done");
619 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
620 struct ltt_ust_session
*usess
)
622 struct cds_lfht_node
*node
, *ua_chan_node
;
623 struct cds_lfht_iter iter
;
624 struct ltt_ust_channel
*uchan
;
625 struct ust_app_channel
*ua_chan
;
627 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
629 ua_sess
->uid
= usess
->uid
;
631 /* TODO: support all UST domain */
633 /* Iterate over all channels in global domain. */
634 hashtable_get_first(usess
->domain_global
.channels
, &iter
);
635 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
636 uchan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
638 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
639 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
640 if (ua_chan_node
== NULL
) {
641 DBG2("Channel %s not found on shadow session copy, creating it",
643 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
644 if (ua_chan
== NULL
) {
645 /* malloc failed... continuing */
649 shadow_copy_channel(ua_chan
, uchan
);
650 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
654 /* Next item in hash table */
655 hashtable_get_next(usess
->domain_global
.channels
, &iter
);
660 * Return ust app session from the app session hashtable using the UST session
663 static struct ust_app_session
*lookup_session_by_app(
664 struct ltt_ust_session
*usess
, struct ust_app
*app
)
666 struct cds_lfht_iter iter
;
667 struct cds_lfht_node
*node
;
669 /* Get right UST app session from app */
670 node
= hashtable_lookup(app
->sessions
,
671 (void *) ((unsigned long) usess
->uid
), sizeof(void *), &iter
);
676 return caa_container_of(node
, struct ust_app_session
, node
);
683 * Create a UST session onto the tracer of app and add it the session
686 * Return ust app session or NULL on error.
688 static struct ust_app_session
*create_ust_app_session(
689 struct ltt_ust_session
*usess
, struct ust_app
*app
)
692 struct ust_app_session
*ua_sess
;
694 ua_sess
= lookup_session_by_app(usess
, app
);
695 if (ua_sess
== NULL
) {
696 DBG2("UST app pid: %d session uid %d not found, creating it",
697 app
->key
.pid
, usess
->uid
);
698 ua_sess
= alloc_ust_app_session();
699 if (ua_sess
== NULL
) {
700 /* Only malloc can failed so something is really wrong */
703 shadow_copy_session(ua_sess
, usess
);
706 if (ua_sess
->handle
== -1) {
707 ret
= ustctl_create_session(app
->key
.sock
);
709 ERR("Error creating session for app pid %d, sock %d",
710 app
->key
.pid
, app
->key
.sock
);
711 /* TODO: free() ua_sess */
715 DBG2("UST app ustctl create session handle %d", ret
);
716 ua_sess
->handle
= ret
;
718 /* Add ust app session to app's HT */
719 hashtable_node_init(&ua_sess
->node
,
720 (void *)((unsigned long) ua_sess
->uid
), sizeof(void *));
721 hashtable_add_unique(app
->sessions
, &ua_sess
->node
);
723 DBG2("UST app session created successfully with handle %d", ret
);
733 * Create the specified channel onto the UST tracer for a UST session.
735 static int create_ust_channel(struct ust_app
*app
,
736 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
740 /* TODO: remove cast and use lttng-ust-abi.h */
741 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
742 (struct lttng_ust_channel_attr
*)&ua_chan
->attr
, &ua_chan
->obj
);
744 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
745 "and session handle %d with ret %d",
746 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
747 ua_sess
->handle
, ret
);
751 ua_chan
->handle
= ua_chan
->obj
->handle
;
752 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
753 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
754 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
756 DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
757 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
764 * Create the specified event onto the UST tracer for a UST session.
766 static int create_ust_event(struct ust_app
*app
,
767 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
,
768 struct ust_app_event
*ua_event
)
772 /* Create UST event on tracer */
773 ret
= ustctl_create_event(app
->key
.sock
, &ua_event
->attr
, ua_chan
->obj
,
776 ERR("Error ustctl create event %s for app pid: %d with ret %d",
777 ua_event
->attr
.name
, app
->key
.pid
, ret
);
781 ua_event
->handle
= ua_event
->obj
->handle
;
782 ua_event
->enabled
= 1;
784 DBG2("UST app event %s created successfully for pid:%d",
785 ua_event
->attr
.name
, app
->key
.pid
);
791 static struct ust_app_channel
*create_ust_app_channel(
792 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
796 struct cds_lfht_iter iter
;
797 struct cds_lfht_node
*ua_chan_node
;
798 struct ust_app_channel
*ua_chan
;
800 /* Lookup channel in the ust app session */
801 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
802 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
803 if (ua_chan_node
== NULL
) {
804 DBG2("Unable to find channel %s in ust session uid %u",
805 uchan
->name
, ua_sess
->uid
);
806 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
807 if (ua_chan
== NULL
) {
810 shadow_copy_channel(ua_chan
, uchan
);
812 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
814 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
817 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
828 static struct ust_app_event
*create_ust_app_event(
829 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
,
830 struct ltt_ust_event
*uevent
, struct ust_app
*app
)
833 struct cds_lfht_iter iter
;
834 struct cds_lfht_node
*ua_event_node
;
835 struct ust_app_event
*ua_event
;
838 ua_event_node
= hashtable_lookup(ua_chan
->events
,
839 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
840 if (ua_event_node
== NULL
) {
841 DBG2("UST app event %s not found, creating it", uevent
->attr
.name
);
842 /* Does not exist so create one */
843 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
844 if (ua_event
== NULL
) {
845 /* Only malloc can failed so something is really wrong */
848 shadow_copy_event(ua_event
, uevent
);
850 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
852 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
855 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
866 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
867 char *pathname
, struct ust_app
*app
)
870 struct lttng_ust_channel_attr uattr
;
872 if (ua_sess
->metadata
== NULL
) {
873 /* Allocate UST metadata */
874 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
875 if (ua_sess
->metadata
== NULL
) {
876 ERR("UST app session %d creating metadata failed",
881 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
882 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
883 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
884 uattr
.switch_timer_interval
=
885 ua_sess
->metadata
->attr
.switch_timer_interval
;
886 uattr
.read_timer_interval
=
887 ua_sess
->metadata
->attr
.read_timer_interval
;
888 uattr
.output
= ua_sess
->metadata
->attr
.output
;
890 /* UST tracer metadata creation */
891 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
892 &ua_sess
->metadata
->obj
);
894 ERR("UST app open metadata failed for app pid:%d",
899 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
902 /* Open UST metadata stream */
903 if (ua_sess
->metadata
->stream_obj
== NULL
) {
904 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
905 &ua_sess
->metadata
->stream_obj
);
907 ERR("UST create metadata stream failed");
911 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d",
912 pathname
, app
->name
, app
->key
.pid
);
914 PERROR("asprintf UST create stream");
918 ret
= mkdir(ua_sess
->metadata
->pathname
, S_IRWXU
| S_IRWXG
);
920 PERROR("mkdir UST metadata");
924 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d/metadata",
925 pathname
, app
->name
, app
->key
.pid
);
927 PERROR("asprintf UST create stream");
931 DBG2("UST metadata stream object created for app pid %d",
942 * Add channel to all ust app session.
944 int ust_app_add_channel_all(struct ltt_ust_session
*usess
,
945 struct ltt_ust_channel
*uchan
)
948 struct cds_lfht_iter iter
;
949 struct cds_lfht_node
*node
;
951 struct ust_app_session
*ua_sess
;
952 struct ust_app_channel
*ua_chan
;
954 if (usess
== NULL
|| uchan
== NULL
) {
955 ERR("Adding UST global channel to NULL values");
960 DBG2("UST app adding channel %s to global domain for session uid %d",
961 uchan
->name
, usess
->uid
);
965 /* For every UST applications registered */
966 hashtable_get_first(ust_app_ht
, &iter
);
967 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
968 app
= caa_container_of(node
, struct ust_app
, node
);
970 /* Create session on the tracer side and add it to app session HT */
971 ua_sess
= create_ust_app_session(usess
, app
);
972 if (ua_sess
== NULL
) {
976 /* Create channel onto application */
977 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
978 if (ua_chan
== NULL
) {
983 /* Next applications */
984 hashtable_get_next(ust_app_ht
, &iter
);
992 int ust_app_add_event_all(struct ltt_ust_session
*usess
,
993 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
996 struct cds_lfht_iter iter
;
997 struct cds_lfht_node
*node
, *ua_chan_node
;
999 struct ust_app_session
*ua_sess
;
1000 struct ust_app_channel
*ua_chan
;
1001 struct ust_app_event
*ua_event
;
1003 DBG("UST app creating event %s for all apps for session uid %d",
1004 uevent
->attr
.name
, usess
->uid
);
1008 /* For all registered applications */
1009 hashtable_get_first(ust_app_ht
, &iter
);
1010 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1011 app
= caa_container_of(node
, struct ust_app
, node
);
1013 /* Create session on the tracer side and add it to app session HT */
1014 ua_sess
= create_ust_app_session(usess
, app
);
1015 if (ua_sess
== NULL
) {
1019 /* Lookup channel in the ust app session */
1020 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
1021 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
1022 if (ua_chan_node
== NULL
) {
1023 ERR("Channel %s not found in session uid %d. Skipping",
1024 uchan
->name
, usess
->uid
);
1027 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1029 ua_event
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
1030 if (ua_event
== NULL
) {
1035 /* Next applications */
1036 hashtable_get_next(ust_app_ht
, &iter
);
1043 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1046 struct cds_lfht_iter iter
;
1047 struct cds_lfht_node
*node
;
1048 struct ust_app_session
*ua_sess
;
1049 struct ust_app_channel
*ua_chan
;
1051 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
1055 ua_sess
= lookup_session_by_app(usess
, app
);
1056 if (ua_sess
== NULL
) {
1057 /* Only malloc can failed so something is really wrong */
1058 goto error_rcu_unlock
;
1061 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
1063 goto error_rcu_unlock
;
1066 /* For each channel */
1067 hashtable_get_first(ua_sess
->channels
, &iter
);
1068 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1069 ua_chan
= caa_container_of(node
, struct ust_app_channel
, node
);
1071 /* Create all streams */
1073 struct ltt_ust_stream
*ustream
;
1075 ustream
= zmalloc(sizeof(*ustream
));
1076 if (ustream
== NULL
) {
1077 PERROR("zmalloc ust stream");
1078 goto error_rcu_unlock
;
1081 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
1084 /* Got all streams */
1087 ustream
->handle
= ustream
->obj
->handle
;
1089 /* Order is important */
1090 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
1091 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s-%d/%s_%u",
1092 usess
->pathname
, app
->name
, app
->key
.pid
,
1093 ua_chan
->name
, ua_chan
->streams
.count
++);
1095 PERROR("asprintf UST create stream");
1098 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
1102 /* Next applications */
1103 hashtable_get_next(ua_sess
->channels
, &iter
);
1106 /* Setup UST consumer socket and send fds to it */
1107 ret
= ust_consumer_send_session(usess
->consumer_fd
, ua_sess
);
1109 goto error_rcu_unlock
;
1112 /* This start the UST tracing */
1113 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
1115 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
1116 goto error_rcu_unlock
;
1120 /* Quiescent wait after starting trace */
1121 ustctl_wait_quiescent(app
->key
.sock
);
1130 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
1133 struct cds_lfht_iter iter
;
1134 struct cds_lfht_node
*node
;
1135 struct ust_app
*app
;
1137 DBG("Starting all UST traces");
1140 hashtable_get_first(ust_app_ht
, &iter
);
1141 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1142 app
= caa_container_of(node
, struct ust_app
, node
);
1144 ret
= ust_app_start_trace(usess
, app
);
1150 /* Next applications */
1151 hashtable_get_next(ust_app_ht
, &iter
);
1158 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
1161 struct cds_lfht_iter iter
;
1162 struct ust_app
*app
;
1163 struct ust_app_session
*ua_sess
;
1164 struct ust_app_channel
*ua_chan
;
1165 struct ust_app_event
*ua_event
;
1167 if (usess
== NULL
) {
1168 DBG2("No UST session on global update. Returning");
1172 DBG2("UST app global update for app sock %d for session uid %d", sock
,
1177 app
= find_app_by_sock(sock
);
1179 ERR("Failed to update app sock %d", sock
);
1183 ua_sess
= create_ust_app_session(usess
, app
);
1184 if (ua_sess
== NULL
) {
1189 * We can iterate safely here over all UST app session sicne the create ust
1190 * app session above made a shadow copy of the UST global domain from the
1193 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
1194 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
1196 /* FIXME: Should we quit here or continue... */
1200 /* For each events */
1201 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
1202 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
1204 /* FIXME: Should we quit here or continue... */
1210 if (usess
->start_trace
) {
1211 ret
= ust_app_start_trace(usess
, app
);
1216 DBG2("UST trace started for app pid %d", app
->key
.pid
);